安全

1. Origins, structure, and basic meaning

• Structure: 安全 is read as あんぜん and is a noun and na-adjective for a state in which danger or harm is absent or adequately controlled.
• Basic usage: Use 安全のため for the purpose of an action and 遊具の安全を確かめる for checking equipment.

2. Common pitfalls and similar expressions

• State and purpose
  • 安全を確かめる checks a condition, while 安全のため gives safety as the purpose or reason.
• Contrast with 安心
  • 安全 concerns the objective danger condition; 安心 concerns a person’s relief from worry.